Cabinet for air stream cooling of filament spun from a polymeric melt



Aug. 12, 1969 A. P. ZAITSEV ETAL CABINET FOR AIR-STREAM COOLING OFFILAMENT SPUN FROM A POLYMERIC MELT Filed Aug. 25. 1966 2 Sheets-Sheet 1s- 1969 A. P. ZAITSEV ETAL 3,460,200

CABINET FOR AIR-STREAM COOLING OF FILANENT SPUN FROM A POLYMERIC MELTFiled Aug. 25, 1966 2 Sheets-Sheet I United States Patent 3,460,200CABINET FOR AIR-STREAM COOLING 0F FILA- MENT SPUN FROM A POLYMERIC MELTAlexandr Pavlovich Zaitsev, Ulitsa Shevchenko 16, ltv. 93; NikolaiFedorovich Klochko, Ulitsa Lenina 42, kv. 42; Leonid FedorovichMarchenko, Ulitsa Tolstogo 106, kv. 8; Evgeny Petrovich Efodiev, UlitsaLenina 35, kv. 67; German Ionasovich Khused, Ulitsa Lenina 42-a, lrv.33; and Vladimir Mikhailovich Zafransky, Ulitsa Tolstogo 148, kv. 20,all of Chernigov, U.S.S.R.

Filed Aug. 25, 1966, Ser. No. 575,180 Int. Cl. 1329b 3/00 U.S. Cl. 188Claims ABSTRACT OF THE DISCLOSURE An apparatus for cooling melt spunsynthetic filaments, having a quenching chamber with a back wall offoraminous material to introduce a stream of a cooling medium thereintoand two side walls, with parallel partitions forming a plurality ofsections for guided passage of the cooling medium under uniform flowconditions. The partitions are of a shaped profile and form a channelfor the passage of a bundle of filaments theretbrough.

This invention relates to devices for filament formation and, morespecifically, to cabinets for cooling filament by an air stream duringthe process of formation thereof.

Prior art cabinets for cooling filaments by an air stream comprise aplenum or pressure chamber and a quenching or blasting chamber separatedfrom each other with screens and a guiding lattice.

The known cooling cabinets, however, are disadvantageous in that whirlsof air streams, fed to cool the filament bundles, arise in the blastingchamber, which adversely affect the filament quality, that is, increasefilament irregularity with respect to count and reduce its tenacity.

It is an object of this invention to preclude the formation of whirls aswell as the endwise motion of the air stream along the filament bundlewithin the zone of formation thereof.

It is likewise an essential object of this invention to improve thequality of the filament being spun.

In the accomplishment of the above and other objects of the invention,in a cabinet thereof comprising a plenum chamber and a quenching chamberseparated by a guiding lattice placed therebetween, provision is made,according to the invention, for parallel partitions mounted at the sidewalls of the quenching chamber said partitions forming a number ofsections for guided travel of the air stream, whereby whirls in saidstream as well as its endwise motion along the filament bundle areprecluded. The partitions are each constituted by pairs of membershaving recesses, a pair of the latter forming a channel for the filamentbundle to pass.

For a better understanding of the invention, one embodiment thereof isdescribed hereinbelow by way of example with reference to the appendeddrawings,'wherein:

FIGURE 1 is a diagrammatic side view partly in section of the cabinetaccording to the invention;

FIGURE 2 is a section taken on line I-I of FIG. 1.

A cabinet for cooling filament is mounted on a spinning machine past aspinning nozzle 1, and consists of chambers 2 and 3 intended for airfeed, and a quenching or blasting chamber 4 separated from chamber 3with screens 5 and a guiding lattice 6. Provision is made on each foldof chamber 4 for partitions 7 which form sections 8 intended to provideguided travel of the air stream and to preclude whirls in said stream asWell as its endwise motion along a filament bundle 9.

Partitions 7 have recessed 10 (FIG. 2), a pair of the latter forming achannel 11 for passage of a filament bundle 9 (FIG. 1).

Chambers 2 and 3 are incorporated in a common hous ing 12 and areseparated from each other with a partition 13. Said chambers 2 and 3 areinterconnected through a common conduit whose lower portion 14, runninginto chamber 2, is made cylindrical, while its upper portion 15, runninginto chamber 3, is made tapered.

Cylindrical portions 14 of the conduit is provided with holes 16,identical in diameter and spaced uniformly over the entire surfacethereof.

Tapered portion 15 of the conduit is provided with holes 17, spaced onlyon that portion of the surface which faces the side opposite screens 5.Holes 17 differ in diameter and are so arranged over the entire heightof the tapered portion 15 of the conduit as to obtain a uniformair-stream exhaust velocity through the entire height of blastingchamber 4.

The lower portion of chamber 2 is connected to a device 18 intended tocontrol the amount of air fed into blasting chamber 4. Device 18 isessentially a lead screw 19 whose nut 20 is coupled through a lever 21to an elastic spring 22. Air is fed to chambers 2 and 3 from a commonair main (not shown in the drawings) via a connection 23. The directionof the air stream is the cabinet as indicated by arrow A.

The cabinet of the present invention functions as follows:

Air flows from the main through the connection 23 and, having passedbetween the coils of spring 22, is fed consecutively to chambers 2 and 3where the pulsation of the air stream is damped. The air stream withdamped pulsation is then reflected from the inner surface of housing 12,and passes, via screens 5 and guiding lattice 6, to blasting chamber 4.Inside this chamber the air flow passes through sections 8 as a guidedstream, whereby a uniform cooling of filament 9 over the entire heightof blasting chamber 4 is obtained.

The amount of air fed to blasting chamber 4 is controlled by varying theintercoil distance of spring 22 by turning lead screw 19.

To control the air expenditure a pressure gage is provided connected tochamber 2 wherein an opening 24 is made for the purpose.

Thus, the cabinet according to the present invention makes it possibleto obtain filament of a negligible irregularity with respect to countand of higher tenacity.

What we claim is:

1. In combination with an apparatus for cooling melt spun syntheticfilaments comprising a quenching chamber having a back wall offoraminous material and opposite side walls, and a plurality of parallelpartitions of shaped profile adjacent said back wall and fixed along theentire width of said side walls to form a plurality of sections fordirecting a stream of a cooling medium forced through said back wall,said parallel partitions being disposed on both side walls at leastthrough a part of the height of said quenching chamber and forming achannel for the passage of a bundle of filaments.

2. The combination as claimed in claim 1 wherein each partition isconstituted by a pair of members having respective recessescooperatively forming said channel.

3. The combination as claimed in claim 2 wherein Said recesses are inalignment in said channel.

4. The combination as claimed in claim 3 wherein said partitions arehorizontally disposed and the channel is vertical.

5. The combination as claimed in claim 4 wherein said members of eachpartition are secured to respective side walls of said quenchingchamber.

(References on following page) 3, References Cited UNITED STATES PATENTS2,947,029 8/1960 Bakker 18-8 3,070,839 1/1963 Thompson 18-8 3,274,6449/1966 Massey et a1. 18-8 '4 3,320,343 5/1967 Buschmann et a1. 18-83,358,326 12/1967 Nommensen et a1. 18-8 FOREIGN PATENTS 1,104,114 4/1961Germany.

WILLIAM J. STEPHENSON, Primary Examiner

